[ted]

As I use to run the "K" grind back in the late Sixties, I went back to the old Ford parts catalogues to see exactly what the specs was on that particular piece. It was the C3AZ-K camshaft with 290°/.500" and was listed for use in the '66 427 both in the 1X4 and 2X4 engines.

Going back a little further I find that the 1963 and 1964 427's had different cams for each year while the 1X4 and 2X4 versions were also different. The 1X4 cams were C3AE-M (276°/.525") and C3AE-U (274°/.525") for '63 and '64 respectively. The 2X4 cams were C3AE-AA (288°/.525") and this one carried through into early 1964 on the 2X4 engines where it was changed out for the C3AE-V cam with 290° duration. Date codes on the engines play heavily on the cam listings in my old reference books and there appears to be a myriad of service cams offered including the aforementioned C3AZ-AA with 306°/.500" specs. I spared you the listed intake/exhaust opening/closing specs.